Week-11 Challenge: Braking

1)The energy reuqired for the braking = 1/2*m*(VI-Vf)^2

2)At starting the motor draws large current due to transient. As torque is proportional to square of the current, torque value is also so high at this moment.when we apply brakes to motor at that time, current value is within the range Therefore torque value is also within the range.

From Torque speed characteristics when speed increase torque should decrease to maintain power constant. At that time starting speed is very low therefore torque value is very high. At that time of braking, speed value is high. At the time of braking, speed value is high therefore torque value will be low. Therefore at the time of braking torque value available will be lower.

In order to stop the vehicle ie requires electrical as well as mechanical brakes.

There are two methods to apply this brakes.

1. Series braking

2. Parallel braking

Series braking: In this mechanical and electrical (Regenerative) brakings are applied oneafter the other.

Parallel Braking: In this both Braking methods are applied at a same time.

At lower speeds Regenerative brakings are used and at higher speeds mechanical brakes are used.

3) The model file has been attached with the report here